Another limitation of the study was the imperfect nature of the stool ova and parasite examination as a measure of effectiveness of the intervention. The sensitivity of the test is variable, based on the type of intestinal parasite. For instance, it is reasonably sensitive for hookworm and ascaris but is insensitive for schistosomiasis and strongyloides. Stool ova and parasite analysis would not routinely detect S. Haematobium. Although the Minnesota Department of Health recommends three ova and parasite examinations for all recently arrived refugees, this is not accomplished uniformly. The actual quantity of submitted stool specimens may possess varied among refugees and among treatment centers.Clinical facilities reviewed medical information to compile lists of sufferers who had received shots from one or more of the three plenty of methylprednisolone acetate. The great deal number was frequently not recorded in medical information; in those instances, facilities determined the period during which vials from the three plenty of methylprednisolone acetate were likely to have been utilized and included all individuals who had received shots of methylprednisolone acetate during that period. Clinical services, with help from state and local health departments and the CDC, notified patients through telephone calls, home appointments, or letters.